Dental tool.



G. PARMITER & M. J. McDONNELL.

DENTAL TOOL. APPLICATION FILED FEB. 12. 1916. 1,184,122. 7 Patented May23, 1916.

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UNITED STATES PATENT orrion.

'GfiElOllEtGiE' PARMITER, OF BUFFALO, NEW YORK, AND MICHAEL J. MUDONNELL, OF

. HOLYOKE, MASSACHUSETTS.

To all whom it may concern Be it known that we, GEORGE PARMITER and MICHAEL J. MGDONNELL, of Buffalo, county of Erie,'State of New York, and

Holyoke, county of Hampden, State of like characters on the drawings representing like" parts. I

This invention relates to dental tools, being intended to provide a simple but effective attachment for a dental engine adapted to impart a reciprocatory movement to a suitable device or implement such as a: saw,

- abrasive or polishingstrip or the like, for

finishing and polishing fillings or separating and excising teeth, or any other purpose where such a reciprocatory movement is required. w

The invention will be best understood by reference to the following description'when taken in connection with the accompanying illustration of one specific embodiment thereof, while its scope will be more particularly pointed out in the appended claims; In the drawings: Figure 1 is a side elevation of a tool embodyingone form of the invention; Fig. '2 is a longitudinal, sectional elevation ofthe same; Fig. 8is a plan view of the head piece which holds and guides the reciprocatory tool-carrying-meinber; Fig. 4 is a plan of the tool shown in Fig. 2,;looking from the underside with the head removed; and Fig. 5-is" a similar plan with the tool carrier removed.

Referring'to the drawings and tothe embodiment of the invention therein shown, the same comprises a holder having the drum-shapedend 1 and the laterally extending neck 2. These and the other parts are shown on an exaggerated scale for the purpose of clearness. The end of the neck is threaded into the forward end of the sleeve 3, which latter is adapted to socket over the standard hand piece of any ordinary dental engine, serving as an intermediate connecting piece between the flexible shaft thereof' Specification of Letters Patent.

DENTAL TOOL.

Patented May 23, 1916.

Application filed February 12, 1916. Serial No. 78,026.

the tool through a suitable driving member, herein consisting of the shaft or spindle 4, journaled in the neck 2 and having an end 5 projecting into the sleeve 3. The end 5 of the shaft has any suitable connection to the driving shaft of the engine. but preferably one which is automatically made as the sleeve is' slipped over the hand piece. At one end of the neck pieceQ the shaft 4 has the collar 6 pinned thereon and at the opposite end the' small, beveled driving pinion 7 located Within the drum 1 and meshing with a beveled gear 8, the-latter arranged to turn within the drum upon the stud 9.

The cutting or abrasive device which is herein shown as a fine toothed saw blade 10, but which maybe of! any suitable character, is shown as removably attached by suitable connections to the U-shaped tool holder 11, the back or connecting piece of the tool holder being in the form of a bar 12 shaped to provide the right-angled slot 13 in which is seated the pin 14 projecting from the back of the beveled gear 8. The bar 12 of the tool. holder is so guided that it may have reciproca'tory movement across the axis of the gear 8, the pin 14 and slot 13 providing a crank and slotted cross-head connection between the gear and the tool holder to convert the rotary movement of the driving shaft into a rapid reciprocatory movement of the tool holder and its attached implement 10. -While the tool holder might be guided to move in a fixed, unchanging path, herein it is arranged to slide in slots 1515 formed in the" rim 16 of a swiveled head piece 17, the latter being'so attached to the drum 1 and holder 2 that it may be turned to a variety of different angles to secure the reciprocatory movement of the implement in the most convenient direction for the work then being performed. The angular adjustment of the tool holder can be had quickly and readily without disconnecting the driving connections and leaving the latter as effective in one position as another. Herein adjustment of the tool holder may be had through a range of approximately 300 degrees. To this end the swiveled head piece 17 is provided'with diametrically opposite ears or lugs 18 which project up over the outside of the drum 1 and overlie a circumferential groove 19 formed therein. These lugs carry in the groove and by means of which the socket is held with the edges of the rim 16 in close abutting contact with the lower edges" 'of the drum 1, while at the same timeper mitting the socket piece to be turned toadjust the tool holder to different angular po-' sitions, as, dotted lines inFig. l;

scribed for purposes of illustration one specific form of the invention, it is to be un-j derstoodthat the same'is not. limited to the constructional details herein shown or to the specific form or arrangement hereln disclosed, but that extensive deviations may be r made therefrom without departing from the spirit of the invention. Claims: 7 V 1. A dental tool for a tool or other implement, means for reciprocating said carrier through the rotation of said drive member, and alholder permitting the adjustment ofsaid carrier to efiect reciprocatory movementin a .plu- -o rality ,of planes having different inclinations with relationyto the axis of said driving'member.

2; A dental tool tary drivingsmember adapted for connection with the rotative shaft of-a dental engine, a reciprocatory carrier for the dental tool or other implement, a guide for said carrier swiveled on' said holder and adapted to adjust said carrierito different angular positions of reciprocation, and

' means for "reciprocating the carrier from the rotary driving member in all the different angular positions of adjustment" 3. A dental tool-comprising a: holder, a

sleeve secured thereto, a spindle havinglan end within the sleeve adapted for connec tion with therotative shaft of a dental en- 7 gine, said spindle: extending into said holder a beveledopinion on the end -,of the 1 spindle, a beveled gear on the holder driven by said spindle, and areciprocatory '1 tool-carrying A member comprising rotary drive member adapted for connection Wlth' a rotative shaft, a reciprocatory carrier having a-holder; a"roj driven from said r:

74 A dental tool comprising a holder, a

sleeve secured-thereto, a spindle'ha-ving an end withinthe sleeve adapted for connection with the 'rotative shaft of a dental en- 'gi ne, said spindle extending into said for example, thatindicated 7 spindle, a beveled gear on the holder driven- VVhile we have herein shown andfde holder, a beveled pinion on the end of the by said spindle, a reciprocatory tool-carry. ing member dI'IVQII" from said gear, and-a head piece guiding said carrier" and swiveled on said holder whereby the carrier maybe adjusted" for angular positions of recipro-wcatory movement on the holder,

5. A dental toolgcomprising a holder, a sleeve secured V thereto, a spindle having an end-within the sleeve adapted for connection, with theairotative shaftof a dental engine,. said spindle extending into said I holder, a reciprocatory tool carrying mem-f tber, ahead' piece guiding said carrieriand swiveled on said holder whereby the carrier 7; may be adjusted for different angular.;pos1-;j-

tions of reciprocatory l novement Dn jtl'le holder, said carrier having an arm provided with a slot at; right anglesto the line ,of re- 'cip'rocatory movement," a'rotary member 1 the holder and havinga pin working in said slot, and beveled-gearingin the'holder'for-H v 8O 7 driving the rotary member from; said spindl.

;6. A dental tool comprising a holder, a- I tool carrier guided in saidholder to have straight line reciprocatory movement, o along a stralght, non-curvilinearzpath a spindle 8 17 7 adapted for connection to the rotative [shaft of a dental engine, and driving connectlonsfl between said'spindle and said tool carrier to. V

impart a r'eciprocatory movement to the latter in said straight path. V

In testimony whereof, u e-havesigned our names tothis SPGClfiCfitlOIlfJIl the presence ofrtwo subscribing'witnesses.1",,- o V GEORGE PARMITER;

' -MIGHAEL Witnesses: l

ROBE T H; KAMMLEB,

' THOMAS E. BOOTH.

p cm" of this patent may be oliteljnq l forffive cents each; by lldrc l lln I'th e jcb im i kf.ja n

J; MCDONNELL; 

